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Tropenpinguin t1_jbqox1d wrote

Reply to comment by ScienceIsSexy420 in Why are Y chromosomes shorter than the X chromosome? by Which-Community-5851

I don't know about that. I'm referring to J. M. Graves, a professor of evolutionary genetics. She looked at how the platypus Y was different to the human Y and calculated how much genetic material had been lost since our species diverged. That's how she got that time frame.

But she also told that some (male) scientists aren't fans of this and try to prove how stable the Y chromosome is.

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ScienceIsSexy420 t1_jbqpf3u wrote

Hmmm, perhaps what I'm thinking is that multiple different male chromosomes have evolved in different branches of evolution?

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Tropenpinguin t1_jbqqgwn wrote

I didn't hear of something like that, but think it's possible.

If you remember or find the info it would be interesting to know.

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